I have a 97 Chevy k1500. The driver's side power seat has a lumbar control (working) and three switches for 3 motors (none are working). I assume all three motors would not quit working at the same time, so I assume none of the 3 switches are getting any power. I would like to know where the main power wires are that feed the switches and how to diagnose this problem. I considered that it may be a fuse problem, but I couldn't find any fuses that were labeled "seat" either in the cab or under the hood. The power locks and windows are all working. Thanks